In my hybrid the 12 volt battery reset switch is in the group of buttons to the left of the steering wheel. It is the bottom right button. I thought only the HEV had a battery reset switch. Not sure about the PHEV, but I could be wrong.

 

Yea, not there. Thanks. I have no clue what the procedure is since I can't find the PHEV manual online and mine is locked in the tuck. This is a total shitshow.

 

Looks like the 12 volt battery is in the trunk area in the well where you would expect a spare tire. Should be able to direct boost the battery, next issue how to open the hatch to get to it - or crawl in by collapsing the rear seats. Roadside assistance is another option.

 

Do you have a dash cam fitted or any other accessories?? that is putting a a drain on the battery, as the battery in the boot
is a small battery. and if you had fitted a dash cam with the optician for it to be in park mode this will drain the battery.

 

Nope

 

Got roadside service for a jump. Drove the car for a half hour in Power mode to keep the engine running to charge the battery which begs the question, what is the point of trying to conserve gas if the **** battery isn't charging and this is going to happen? Seems to me there's a serious misjudgment in how the powertrain was designed. Not only do we have to keep tabs on charging the high voltage battery and gas, but now the 12v battery. To that end, I don't see any way to see how charged the battery is. I don't understand why the high voltage batteries can't trickle charge the 12v battery, at least when it goes below a certain level.

With the way I intended, and am using this car, this seems untenable now that the cold weather is gone. My efforts to avoid using gas will only compromise keeping the 12v battery charged. I can't see the status of that battery so on my short trips, when I thought I could optimize battery only usage, now I have to intentionally use gas or risk the battery dying again. (I'm thinking the battery didn't just die because I hadn't driven for 8 days, but because before that my usage negated much use of gas so the battery wasn't really getting much chance to charge even when I was driving.)

This is totally perplexing, annoying, and possibly a deal breaker for me. Any apprehension I had before about going totally EV (instead of a PHEV) are muted by this issue.

 

I'm thinking the battery didn't just die because I hadn't driven for 8 days, but because before that my usage negated much use of gas so the battery wasn't really getting much chance to charge even when I was driving.

I agree. Seems like an engineering oversight on Hyundai’s part. The HEV constantly cycles the engine on and off, allowing even the small 12v battery partition to keep sufficiently charged. Back in May I parked my Tucson for a full week at the airport. Luckily there was no issue and the car started right up. I will be pushing the limit again in October when a go on a 8 day cruise. But at least I have the reset button just in case. I can’t believe Hyundai didn’t give PHEV owners an easy way to resurrect the 12v battery, especially if the engine is not run for a lengthy time.

 

its why? i totally hate E.V.'s were not ready for them. there not practicall to have around & the mileage they clame you get on a full charge is never even close to being realistic and good luck finding a charging station in a urban area/country side they take a long time to charge expensive to repair being only dealer just nonsense after nosense with e.v' crap everything screams stay away no thx i will stick with my Gas/Diesel engine as long as i possibly can. soory johncap cant help you.

 

Boy, you’d make a good American. Are you lost in Canada?

First, most EVs ARE getting the advertised range, if not more, in mild weather. Second, at one time there were few gas stations too. Diesel is the worst of the worst. You might as well be burning coal.

 

Have you ever given thought if everyone like you. would convert over to e.v. over night? what would happen to the power grid? it would fail face flat. power company's have not upgraded every nahbourhood transformer or your household utility board to higher amps to meet demands and still the million dollar question no one can answer today is when they stop making the internal

combustion engine & go all e.v's where is the power suplied coming from to suport the grid population ever ask yourself that? government is dreaming by puting the horse in front of the cariage with-out providing answeres as to how this is going to happen? enjoy your phev when youl need a gas driven generater to charge it for days on end. lol

 

Have you ever given thought if everyone like you. would convert over to e.v. over night? what would happen to the power grid? it would fail face flat. power company's have not upgraded every nahbourhood transformer or your household utility board to higher amps to meet demands and still the million dollar question no one can answer today is when they stop making the internal

combustion engine & go all e.v's where is the power suplied coming from to suport the grid population ever ask yourself that? government is dreaming by puting the horse in front of the cariage with-out providing answeres as to how this is going to happen? enjoy your phev when youl need a gas driven generater to charge it for days on end. lol

Fortunately it’ll be a gradual transition just like everything else in the history of transportation, but I’m sure the sky is falling irrationale for not getting off oil is a good one for you.

 

There is an emergency hatch release latch. If you look inside the hatch lid, there is a slit where you insert something flat and push to the right to release it.

As to jumping the battery, there is a 12V positive terminal in the fuse box in the engine compartment.

There is no battery saver function in the PHEV. I think I've read it somewhere that in the PHEV it is always on, and Hyundai took away the ability to turn it off. I also have an Ioniq PHEV and it does have the ability to toggle battery saver on and off in the menu. I suppose Hyundai decided that it should just always be on. As to why it allowed your 12V to discharge, I couldn't tell you.

 

We recently went on a trip and our 2022 Tucson PHEV Limited was parked in the garage while we were gone. After it was idle for 8 days it started fine and we did not receive any warnings that the 12 volt auxiliary battery was low.

 

We recently went on a one-month trip. Given some previous posts, and also that I have to turn off the prox key on my 2008 Prius for extended absences, I was nervous about my Tucson PHEV. The car is parked outdoors, adding North Carolina heat as a stressor. When we returned the car started right up with no warnings.

You might have your dealer or AAA "load test" the 12V battery. It could just be a bad battery.

 

What I’m thinking, or wondering, is, how much if any the battery charges when driving almost exclusively on electric. So, let’s say the prior week I drive 5 days for 30ish miles with little to no ICE use. Then the car is parked for 8 days. Without a battery meter, who knows. I’m going in to the dealer this week to discuss this even though I’m 1,000% sure they’ll know less than me about it.

But now I’ve got something to be fixed too: the black plastic cover on the inside of the windshield behind the rear view mirror keeps popping open…yea, another first world catastrophe.

 

Quick Google hit.............

Can the plug in hybrid charge the 12v battery in EV mode?

I’ve been having issues with my 12v battery draining. Since I bought the car, I often see the ‘aux battery saver has been used while parked’ message come up - maybe twice a week. That’s telling me that it gave the 12v battery a boost from the high voltage battery. Now that I’m driving less...

www.ioniqforum.com

 

Your Googling is more effective than mine. I didn't find it.... That's VERY interesting. I hope it's true that the high voltage system charges the 12v battery when on, but it does beg the question why can't it trickle charge the 12v battery when you're not driving.... I guess I have to get a new trickle charger.

Thanks brother....